(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "Text Book Of Mechanical Engineering"

*.

f|!
f

m



I

528

Tension of Belts.

make a constant angle with the radii, and if the angles cr are taken
small, the construction is fairly correct. But greater accuracy is
secured by using the equation to the curve,

T

where e = 2718, the base of Napieran logarithms.

More usefully the formula becomes

L0,@

/     (See Appendix //.,
43 M-           /867.)

Then, the  log.  being known, the corresponding number is
found from  a table, and  the  formula used  for  any  value   of

-, even beyond 360.

COEFFICIENT OF FRICTION (/*) IN TENSION ELEMENTS.

Leather belting" on iron pullies .........
	"\ to *A
	i "5 if oily

 Wire rope or^iron pullies ...............
	'is
	

'Wire rope 0n leather-bottomed pullies Hemp rope on jbron pullies    ....... .....
	25 '28 to *i8
	) not accounting >    for wedge \    action